101 lines
2.3 KiB
C
101 lines
2.3 KiB
C
/* $Id: cksum.c,v 1.1 1997/06/30 03:48:05 cvs Exp $
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*/
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/* Undernet Channel Service (X)
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* Copyright (C) 1995-2002 Robin Thellend
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* The author can be contact by email at <csfeedback@robin.pfft.net>
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*
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* Please note that this software is unsupported and mostly
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* obsolete. It was replaced by GNUworld/CMaster. See
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* http://gnuworld.sourceforge.net/ for more information.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <ctype.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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void cksum(char *file, unsigned int *sum1, unsigned int *sum2)
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{
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int fd=-1, size;
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unsigned char buffer[1024];
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if(strchr(file,'/') != NULL)
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{
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fd = open(file,O_RDONLY);
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}
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else /* check path */
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{
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char *tok,*path = getenv("PATH");
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if(path == NULL)
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return;
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for(tok=strtok(path,":"); tok!=NULL; tok=strtok(NULL,":"))/* mangles PATH*/
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{
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strncpy(buffer,tok,1023);
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strncat(buffer,"/",1023);
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strncat(buffer,file,1023);
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buffer[1023] = '\0';
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fd = open(buffer,O_RDONLY);
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if(fd >= 0)
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break;
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}
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}
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if(fd<0)
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{
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return;
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}
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*sum1 = *sum2 = 0;
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while((size=read(fd,buffer,1023))>0)
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{
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while(size--)
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{
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*sum1 += buffer[size];
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*sum2 += (size&1)?-buffer[size]:buffer[size];
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}
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}
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close(fd);
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}
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#ifdef MAIN
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int main(int argc, char **argv)
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{
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unsigned int sum,pro;
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if(argc != 2)
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{
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fprintf(stderr,"usage: %s file\n",argv[0]);
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exit(1);
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}
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cksum(argv[1],&sum,&pro);
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printf("-DBINCKSUM1=0x%x -DBINCKSUM2=0x%x\n",sum,pro);
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exit(0);
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}
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#endif
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